When simplifying algebraic expressions, it’s necessary to combine all like terms together. Given a long list of objects in real life, summarizing the list is one big step in putting order to it. Just like in combining like terms, similar objects in the list can be put together for better organization. Learn how to combine like terms with rational numerical coefficients by helping Laura, an archaeologist, put back together pieces of broken artifacts that she found in a historical site in Cambodia. Common Core Reference: CCSS.MATH.CONTENT.7.EE.A.1